CN112528388B - Suspension bracket strength analysis method and device, storage medium and terminal equipment - Google Patents
Suspension bracket strength analysis method and device, storage medium and terminal equipment Download PDFInfo
- Publication number
- CN112528388B CN112528388B CN201910796558.8A CN201910796558A CN112528388B CN 112528388 B CN112528388 B CN 112528388B CN 201910796558 A CN201910796558 A CN 201910796558A CN 112528388 B CN112528388 B CN 112528388B
- Authority
- CN
- China
- Prior art keywords
- load
- suspension bracket
- strength
- working condition
- suspension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 222
- 238000004458 analytical method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 claims description 19
- 238000004590 computer program Methods 0.000 claims description 17
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a suspension bracket strength analysis method, a suspension bracket strength analysis device, a storage medium and terminal equipment, wherein the suspension bracket strength analysis method comprises the following steps: acquiring rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of a whole vehicle coordinate system; decomposing the load applied to the suspension bracket in each direction under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load; the first load is loaded to the main spring rubber, and the second load is loaded to the limit rubber; performing grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket; respectively loading a first load and a second load to grid areas corresponding to the suspension brackets; establishing boundary constraint conditions according to the load applied to the suspension bracket, and calculating to obtain a stress value; and analyzing the strength of the suspension bracket according to the stress value. The invention can reasonably and effectively apply load to the suspension bracket, thereby obtaining more accurate strength analysis results, improving the reliability of the suspension bracket structure and reducing the risk of strength failure.
Description
Technical Field
The invention relates to the technical field of automobile power assemblies, in particular to a suspension bracket strength analysis method, a suspension bracket strength analysis device, a computer readable storage medium and terminal equipment.
Background
Suspension type power assemblies are widely applied to automobiles, and the suspension type suspension system generally comprises a left suspension, a right suspension and a torsion-resistant pull rod, has good NVH performance, and can control movement of the power assembly well. Under different working conditions, the left suspension and the right suspension can bear complex loads in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system at the same time, so that the structure of the suspension bracket is complex, and high requirements are put forward on the strength design of the suspension bracket.
Because the structure and the stress of the suspension bracket are complex, if the strength of the suspension bracket is required to be accurately analyzed, the load is required to be reasonably applied during analysis, so that how to apply the load has a great influence on the analysis result. At present, the prior art generally adopts a finite element method to analyze the strength of a suspension bracket, when the finite element strength analysis of the suspension bracket is carried out, loads of all working conditions are applied to all possible acting areas of suspension rubber, but the method can lead the acting effect of the applied loads to be inconsistent with the acting effect of the actual suspension rubber, the strength analysis result is affected, the stress value analyzed by the loading mode is smaller, the defect position of the structural design of the suspension bracket cannot be fully exposed, and the structural design has the risk of strength failure.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a suspension bracket strength analysis method, a suspension bracket strength analysis device, a computer-readable storage medium and a terminal device, which can reasonably and effectively apply load to a suspension bracket, so that a more accurate suspension bracket strength analysis result is obtained, the reliability of a suspension bracket structure is improved, and the strength failure risk is reduced.
In order to solve the above technical problems, an embodiment of the present invention provides a suspension bracket strength analysis method, including:
acquiring rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of a whole vehicle coordinate system;
Decomposing the load applied to the suspension bracket in each direction under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load; the first load is used for loading the suspended main spring rubber, and the second load is used for loading the suspended limit rubber;
performing grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket;
loading the first load and the second load to grid areas corresponding to the suspension brackets respectively;
Establishing boundary constraint conditions according to the load applied to the suspension bracket, and calculating to obtain a stress value;
and analyzing the strength of the suspension bracket according to the stress value.
Further, the decomposing the load applied to each direction of the suspension bracket under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load specifically includes:
determining critical loads in the X direction, the Y direction and the Z direction according to the stiffness curve;
decomposing the load applied to the corresponding direction of the suspension bracket under any working condition according to the critical load in any direction, and correspondingly obtaining a third load and a fourth load;
And correspondingly superposing the first load and the second load according to the third load and the fourth load applied to the suspension bracket in each direction under each working condition.
Further, the decomposing the load applied to the suspension bracket in the corresponding direction under any working condition according to the critical load in any direction, so as to obtain a third load and a fourth load correspondingly, which specifically include:
When the critical load takes the whole vehicle coordinate system as a reference to be a positive value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part not greater than the critical load as a third load and the part greater than the critical load as a fourth load.
Further, the decomposing the load applied to the suspension bracket in the corresponding direction under any working condition according to the critical load in any direction, so as to obtain a third load and a fourth load correspondingly, which specifically include:
When the critical load takes the whole vehicle coordinate system as a reference to be a negative value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part which is not smaller than the critical load as a third load and the part which is smaller than the critical load as a fourth load.
Further, the obtaining the first load and the second load according to corresponding superposition of the third load and the fourth load applied to each direction of the suspension bracket under each working condition specifically includes:
Vector superposition is carried out on the third load applied to each direction of the suspension bracket under each working condition, so that the first load is obtained;
And carrying out vector superposition on the fourth load applied to each direction of the suspension bracket under each working condition to obtain the second load.
Further, the analyzing the strength of the suspension bracket according to the stress value specifically includes:
Comparing the stress value with a preset target stress value; wherein the target stress value is the yield limit of the material of the suspension bracket;
When the stress value is smaller than the target stress value, judging that the strength of the suspension bracket is qualified;
and when the stress value is not smaller than the target stress value, judging that the strength of the suspension bracket is unqualified.
Further, the operating conditions include at least one forward operating condition, at least one reverse operating condition, at least one forward limit operating condition, and at least one reverse limit operating condition.
In order to solve the above technical problems, an embodiment of the present invention further provides a suspension bracket strength analysis device, including:
the rigidity curve acquisition module is used for acquiring rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system;
The load decomposition module is used for decomposing the load applied to each direction of the suspension bracket under each working condition according to the stiffness curve, and superposing the load to obtain a first load and a second load; the first load is used for loading the suspended main spring rubber, and the second load is used for loading the suspended limit rubber;
The grid division module is used for carrying out grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket;
the load loading module is used for loading the first load and the second load to grid areas corresponding to the suspension brackets respectively;
The stress acquisition module is used for establishing boundary constraint conditions according to the load applied to the suspension bracket and calculating to obtain a stress value; and
And the strength analysis module is used for analyzing the strength of the suspension bracket according to the stress value.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program; wherein the computer program, when run, controls the apparatus in which the computer readable storage medium resides to perform the suspension bracket strength analysis method of any one of the above.
The embodiment of the invention also provides a terminal device, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor realizes the suspension bracket strength analysis method according to any one of the above when executing the computer program.
Compared with the prior art, the embodiment of the invention provides a suspension bracket strength analysis method, a suspension bracket strength analysis device, a computer-readable storage medium and a terminal device, wherein the loads applied to the suspension bracket in each direction under each working condition are decomposed according to the rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of a whole vehicle coordinate system, the first load acting on the suspension main spring rubber and the second load acting on the suspension limit rubber are obtained, the first load and the second load are respectively loaded to grid areas corresponding to the suspension bracket, stress values are obtained through calculation according to the load application condition, and the strength of the suspension bracket is analyzed according to the stress values, so that the load can be reasonably and effectively applied to the suspension bracket, further more accurate suspension bracket strength analysis results are obtained, the reliability of a suspension bracket structure is improved, and the strength failure risk is reduced.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a method for analyzing the strength of a suspension bracket according to the present invention;
FIG. 2 is a schematic diagram showing the X-direction stiffness of a method for analyzing the strength of a suspension bracket according to the present invention;
Fig. 3A and fig. 3B are schematic diagrams of rubber positions and load loading according to the method for analyzing the strength of a suspension bracket provided by the invention;
FIG. 4 is a block diagram of a preferred embodiment of a suspension mount strength analysis device provided by the present invention;
Fig. 5 is a block diagram of a preferred embodiment of a terminal device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
The embodiment of the invention provides a suspension bracket strength analysis method, which is applicable to both left suspension and right suspension of a suspension system, and is a flowchart of a preferred embodiment of the suspension bracket strength analysis method provided by the invention, referring to fig. 1, and the method comprises steps S11 to S16:
and S11, acquiring stiffness curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system.
Specifically, with the whole vehicle coordinate system as a reference, the stiffness curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system are respectively obtained through testing or simulation analysis, and are shown by combining with fig. 2, the stiffness curve diagram in the X direction of the suspension bracket strength analysis method provided by the invention is shown, wherein the abscissa of the stiffness curve represents displacement (in mm), and the ordinate represents load (namely the received force in newton N).
It should be noted that, due to the inconsistent structure of the suspension bracket in each direction, the stiffness curves in each direction are different, but the stiffness curves in the Y direction and the Z direction are similar to those in the X direction, but specific displacement and load values are different, and due to the effects of the suspension main spring rubber and the limit rubber, the stiffness curves in each direction all show nonlinear characteristics.
S12, decomposing the load applied to each direction of the suspension bracket under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load; the first load is used for loading the suspended main spring rubber, and the second load is used for loading the suspended limit rubber.
Specifically, since the load applied to the suspension acts on the main spring rubber and the stopper rubber respectively, and the load is transferred to the corresponding portion of the suspension bracket, the load needs to be decomposed according to the obtained stiffness curve, and the loads applied to all directions of the suspension bracket under all working conditions and each direction need to be decomposed respectively, so as to obtain a first load acting on the main spring rubber and a second load acting on the stopper rubber in a corresponding superposition manner, wherein the first load and the second load are the superposition of the loads obtained by the corresponding decomposition applied to the suspension bracket in the X direction, the Y direction and the Z direction under all working conditions.
It should be noted that, in practical application, the main spring rubber may receive the superposition load in the X direction, the Y direction and the Z direction, and since the general purpose of the design of the limiting rubber is to bear the load in a single direction, the limiting rubber may not receive the superposition load in multiple directions.
And S13, carrying out grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket.
Specifically, the size of the grid is determined according to geometric structural characteristics (such as metal plate chamfer angles, minimum thickness and other dimensional characteristics) of the suspension bracket, and the finite element model of the suspension bracket is subjected to grid division according to the size of the grid.
And S14, loading the first load and the second load to grid areas corresponding to the suspension brackets respectively.
Specifically, according to the first load and the second load obtained by decomposition and superposition, the first load and the second load are respectively loaded to a grid area corresponding to the suspension bracket, and are shown in fig. 3A and 3B, which are a rubber position and a load loading schematic diagram of the suspension bracket strength analysis method provided by the invention, wherein F 1 in the figure represents the first load, F 2 in the figure represents the second load, the first load F 1 is loaded to a grid area corresponding to a part of the suspension bracket by main spring rubber, and the second load F 2 is loaded to another grid area corresponding to the suspension bracket by limit rubber, so that the actual suspension load effect is accurately simulated.
And S15, establishing boundary constraint conditions according to the load applied to the suspension bracket, and calculating to obtain a stress value.
Specifically, boundary constraint conditions are established according to loads applied to grid areas corresponding to the suspension brackets, and boundary constraint is carried out to calculate and obtain corresponding stress values.
It should be noted that, when the finite element method is used to calculate the strength of the part, a boundary constraint needs to be established for the part to fix the part, for example, six degrees of freedom of the center point of the mounting hole of the suspension bracket need to be constrained in the embodiment of the invention, so that the suspension bracket is ensured not to move, and load can be applied and stress value calculation can be performed.
And S16, analyzing the strength of the suspension bracket according to the stress value.
Specifically, the strength of the suspension bracket is analyzed according to the stress value obtained by calculation, so as to judge the strength of the suspension bracket.
According to the method for analyzing the strength of the suspension bracket, which is provided by the embodiment of the invention, the load applied to each direction of the suspension bracket under each working condition is decomposed according to the stiffness curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system, the first load acting on the suspended main spring rubber and the second load acting on the suspended limit rubber are obtained, the first load and the second load are respectively loaded to the grid area corresponding to the suspension bracket, the stress value is obtained according to the calculation of the load application condition, and the strength of the suspension bracket is analyzed according to the stress value, so that the load can be reasonably and effectively applied to the suspension bracket, further more accurate analysis results of the strength of the suspension bracket are obtained, the suspension bracket structure is simple and efficient, the design of the suspension bracket structure is more reasonable according to the analysis results, the reliability of the suspension bracket structure is improved, and the strength failure risk is reduced.
In another preferred embodiment, the decomposing the load applied to each direction of the suspension bracket under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load specifically includes:
determining critical loads in the X direction, the Y direction and the Z direction according to the stiffness curve;
decomposing the load applied to the corresponding direction of the suspension bracket under any working condition according to the critical load in any direction, and correspondingly obtaining a third load and a fourth load;
And correspondingly superposing the first load and the second load according to the third load and the fourth load applied to the suspension bracket in each direction under each working condition.
Specifically, in combination with the above embodiment, since the stiffness curve exhibits a nonlinear characteristic, the load corresponding to the moment when the slope of the stiffness curve is significantly changed is used as the critical load, the critical load in the X direction, the critical load in the Y direction, and the critical load in the Z direction are respectively determined, the loads applied in the X direction, the Y direction, and the Z direction under each working condition are respectively decomposed according to the determined critical loads, the loads applied in each working condition in each direction can be decomposed into the third load acting on the main spring rubber and the fourth load acting on the stopper rubber, the first load under each working condition can be obtained by superposing the third loads applied in the X direction, the Y direction, and the Z direction under each working condition, and the second load under each working condition can be obtained by superposing the fourth loads applied in the X direction, the Y direction, and the Z direction under each working condition.
As an improvement of the above solution, the decomposing the load applied to the suspension bracket in the corresponding direction under any working condition according to the critical load in any direction, to obtain the third load and the fourth load correspondingly, specifically includes:
When the critical load takes the whole vehicle coordinate system as a reference to be a positive value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part not greater than the critical load as a third load and the part greater than the critical load as a fourth load.
When the determined critical load is positive with respect to the vehicle coordinate system, the load applied in the positive X direction should be decomposed, the positive load and the positive critical load should be compared, and the portion not larger than the positive critical load is the third load and the portion larger than the positive critical load is the fourth load.
The following description will be made taking, as an example, a load applied to the suspension bracket in the positive X direction under a certain operating condition, with reference to fig. 2:
The positive load applied in the X direction is approximately decomposed, and the load is classified by taking f X(fX >0 corresponding to the obvious change of the slope of the stiffness curve in the X direction as a critical load, wherein the partial load not more than f X acts on the main spring rubber, and the partial load more than f X acts on the limit rubber.
As an improvement of the above solution, the decomposing the load applied to the suspension bracket in the corresponding direction under any working condition according to the critical load in any direction, to obtain the third load and the fourth load correspondingly, specifically includes:
When the critical load takes the whole vehicle coordinate system as a reference to be a negative value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part which is not smaller than the critical load as a third load and the part which is smaller than the critical load as a fourth load.
It will be understood that when the determined critical load is negative with respect to the vehicle coordinate system, the load applied in the X negative direction should be decomposed, the negative load and the negative critical load should be compared, and a portion not smaller than the negative critical load (a portion where the absolute value of the load is equal to or smaller than the absolute value of the critical load) is regarded as the third load, and a portion smaller than the negative critical load (a portion where the absolute value of the load is larger than the absolute value of the critical load) is regarded as the fourth load.
As an improvement of the above solution, the obtaining the first load and the second load according to corresponding superposition of the third load and the fourth load applied to each direction of the suspension bracket under each working condition specifically includes:
Vector superposition is carried out on the third load applied to each direction of the suspension bracket under each working condition, so that the first load is obtained;
And carrying out vector superposition on the fourth load applied to each direction of the suspension bracket under each working condition to obtain the second load.
Specifically, in combination with the above embodiment, since the applied load may be positive or negative with respect to the whole vehicle coordinate system, when the first load and the second load corresponding to each working condition are obtained, the third loads respectively applied in the X direction, the Y direction, and the Z direction under the working condition need to be superimposed, and when the first load corresponding to the working condition is correspondingly obtained, the fourth loads respectively applied in the X direction, the Y direction, and the Z direction under the working condition are respectively superimposed, and the second load corresponding to the working condition is correspondingly obtained.
For example, for any one of conditions 1, the first load F 1 corresponding to condition 1 may be represented as F 1＝FX1+FY1+FZ1, where F X1 represents the third load applied in the direction of the suspension mount X under condition 1; f Y1 represents a third load applied in the Y direction of the suspension mount under condition 1; f Z1 represents a third load applied in the suspension bracket Z direction under condition 1.
Similarly, the second load F 2 corresponding to the condition 1 is denoted as F 2＝FX2+FY2+FZ2, where F X2 represents the fourth load applied in the X direction of the suspension bracket under the condition 1; f Y2 represents a fourth load applied in the Y direction of the suspension mount under condition 1; f Z2 denotes that the fourth load applied in the suspension bracket Z direction under condition 1 is under condition 1.
It should be noted that, under each working condition, the loads in the X direction, the Y direction, and the Z direction under the corresponding working conditions need to be decomposed and superimposed, so as to obtain the corresponding loading load under each working condition, and the decomposition and the superposition processes under each working condition need to be calculated separately and are mutually independent.
In a further preferred embodiment, the analyzing the strength of the suspension bracket according to the stress value specifically includes:
Comparing the stress value with a preset target stress value; wherein the target stress value is the yield limit of the material of the suspension bracket;
When the stress value is smaller than the target stress value, judging that the strength of the suspension bracket is qualified;
and when the stress value is not smaller than the target stress value, judging that the strength of the suspension bracket is unqualified.
Specifically, in combination with the above embodiment, when the strength of the suspension bracket is analyzed according to the stress value obtained by calculation, since the yield limit of the material of the suspension bracket is used as the strength judgment basis in the general industry, the present embodiment compares the stress value obtained by calculation with the preset target stress value, that is, the yield limit of the material of the suspension bracket, and when the stress value obtained by calculation is smaller than the target stress value, the strength of the suspension bracket is judged to be qualified, and when the stress value obtained by calculation is not smaller than the target stress value, the strength of the suspension bracket is judged to be unqualified.
Preferably, the operating conditions include at least one forward operating condition, at least one reverse operating condition, at least one forward limit operating condition, and at least one reverse limit operating condition. The forward working conditions comprise full throttle forward, full throttle left or full throttle downward.
In practical application, the number of working conditions is generally about 30, which is not listed here.
The embodiment of the invention also provides a suspension bracket strength analysis device, which can realize all the processes of the suspension bracket strength analysis method in any embodiment, and the actions and the realized technical effects of each module and unit in the device are respectively the same as those of the suspension bracket strength analysis method in the embodiment, and are not repeated here.
Referring to fig. 4, there is shown a block diagram of a preferred embodiment of a suspension bracket strength analysis apparatus according to the present invention, the apparatus comprising:
the rigidity curve acquisition module 11 is used for acquiring rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system;
the load decomposition module 12 is used for decomposing the load applied to each direction of the suspension bracket under each working condition according to the stiffness curve, and superposing the first load and the second load; the first load is used for loading the suspended main spring rubber, and the second load is used for loading the suspended limit rubber;
The grid division module 13 is used for carrying out grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket;
a load loading module 14, configured to load the first load and the second load to grid areas corresponding to the suspension brackets respectively;
A stress acquisition module 15 for establishing boundary constraint conditions according to the load applied to the suspension bracket and calculating to obtain a stress value; and
And the strength analysis module 16 is used for analyzing the strength of the suspension bracket according to the stress value.
Preferably, the load splitting module 12 specifically includes:
the critical load determining unit is used for determining critical loads in the X direction, the Y direction and the Z direction according to the stiffness curve;
the load decomposition unit is used for decomposing the load applied to the corresponding direction of the suspension bracket under any working condition according to the critical load in any direction, and correspondingly obtaining a third load and a fourth load;
And the load superposition unit is used for correspondingly superposing the third load and the fourth load applied to each direction of the suspension bracket under each working condition to obtain the first load and the second load.
Preferably, the load splitting unit is specifically configured to:
When the critical load takes the whole vehicle coordinate system as a reference to be a positive value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part not greater than the critical load as a third load and the part greater than the critical load as a fourth load.
Preferably, the load splitting unit is specifically configured to:
When the critical load takes the whole vehicle coordinate system as a reference to be a negative value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part which is not smaller than the critical load as a third load and the part which is smaller than the critical load as a fourth load.
Preferably, the load superimposing unit is specifically configured to:
Vector superposition is carried out on the third load applied to each direction of the suspension bracket under each working condition, so that the first load is obtained;
And carrying out vector superposition on the fourth load applied to each direction of the suspension bracket under each working condition to obtain the second load.
Preferably, the intensity analysis module 16 specifically includes:
The stress comparison unit is used for comparing the stress value with a preset target stress value; wherein the target stress value is the yield limit of the material of the suspension bracket;
The first judging unit is used for judging that the strength of the suspension bracket is qualified when the stress value is smaller than the target stress value;
and the second judging unit is used for judging that the strength of the suspension bracket is unqualified when the stress value is not smaller than the target stress value.
Preferably, the operating conditions include at least one forward operating condition, at least one reverse operating condition, at least one forward limit operating condition, and at least one reverse limit operating condition.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program; the method for analyzing the strength of the suspension bracket according to any of the above embodiments is performed by the computer program when running.
An embodiment of the present invention further provides a terminal device, referring to fig. 5, which is a block diagram of a preferred embodiment of a terminal device provided by the present invention, where the terminal device includes a processor 10, a memory 20, and a computer program stored in the memory 20 and configured to be executed by the processor 10, and the processor 10 implements the suspension bracket strength analysis method according to any one of the foregoing embodiments when executing the computer program.
Preferably, the computer program may be partitioned into one or more modules/units (e.g., computer program 1, computer program 2, & gtthe & lt- & gt, & lt- & gt) that are stored in the memory 20 and executed by the processor 10 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions, which instruction segments are used for describing the execution of the computer program in the terminal device.
The Processor 10 may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic, discrete hardware components, etc., or the Processor 10 may be a microprocessor, or the Processor 10 may be any conventional Processor, the Processor 10 being a control center of the terminal device, connecting the various parts of the terminal device using various interfaces and lines.
The memory 20 mainly includes a program storage area, which may store an operating system, application programs required for at least one function, and the like, and a data storage area, which may store related data and the like. In addition, the memory 20 may be a high-speed random access memory, a nonvolatile memory such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD), etc., or the memory 20 may be other volatile solid-state memory devices.
It should be noted that the above-mentioned terminal device may include, but is not limited to, a processor, a memory, and those skilled in the art will understand that the structural block diagram of fig. 5 is merely an example of the above-mentioned terminal device, and does not constitute limitation of the terminal device, and may include more or less components than those illustrated, or may combine some components, or different components.
In summary, according to the method, the device, the computer-readable storage medium and the terminal equipment for analyzing the strength of the suspension bracket provided by the embodiment of the invention, the load applied to each direction of the suspension bracket under each working condition is decomposed according to the stiffness curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system, the first load acting on the suspended main spring rubber and the second load acting on the suspended limit rubber are obtained, the first load and the second load are respectively loaded to the grid area corresponding to the suspension bracket, the stress value is obtained through calculation according to the load application condition, and the strength of the suspension bracket is analyzed according to the stress value, so that the load can be reasonably and effectively applied to the suspension bracket, further, a more accurate suspension bracket strength analysis result is obtained, a suspension bracket structure which is simple and efficient is designed more reasonably according to the analysis result is improved, and the reliability of the suspension bracket structure is reduced.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (9)
1. A method of analyzing the strength of a suspension mount, comprising:
acquiring rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of a whole vehicle coordinate system;
Decomposing the load applied to the suspension bracket in each direction under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load; the first load is used for loading the suspended main spring rubber, and the second load is used for loading the suspended limit rubber;
performing grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket;
loading the first load and the second load to grid areas corresponding to the suspension brackets respectively;
Establishing boundary constraint conditions according to the load applied to the suspension bracket, and calculating to obtain a stress value;
Analyzing the strength of the suspension bracket according to the stress value;
decomposing the load applied to the suspension bracket in each direction under each working condition according to the stiffness curve, and superposing to obtain a first load and a second load, wherein the method specifically comprises the following steps of:
determining critical loads in the X direction, the Y direction and the Z direction according to the stiffness curve;
decomposing the load applied to the corresponding direction of the suspension bracket under any working condition according to the critical load in any direction, and correspondingly obtaining a third load and a fourth load;
And correspondingly superposing the first load and the second load according to the third load and the fourth load applied to the suspension bracket in each direction under each working condition.
2. The method for analyzing the strength of the suspension bracket according to claim 1, wherein the decomposing the load applied to the suspension bracket in the corresponding direction under any working condition according to the critical load in any direction, respectively obtaining the third load and the fourth load, specifically comprises:
When the critical load takes the whole vehicle coordinate system as a reference to be a positive value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part not greater than the critical load as a third load and the part greater than the critical load as a fourth load.
3. The method for analyzing the strength of the suspension bracket according to claim 1, wherein the decomposing the load applied to the suspension bracket in the corresponding direction under any working condition according to the critical load in any direction, respectively obtaining the third load and the fourth load, specifically comprises:
When the critical load takes the whole vehicle coordinate system as a reference to be a negative value, regarding the load applied to the corresponding direction of the suspension bracket under any working condition, taking the part which is not smaller than the critical load as a third load and the part which is smaller than the critical load as a fourth load.
4. The method for analyzing the strength of the suspension bracket according to claim 1, wherein the first load and the second load are obtained by corresponding superposition of a third load and a fourth load applied to each direction of the suspension bracket under each working condition, specifically comprising:
Vector superposition is carried out on the third load applied to each direction of the suspension bracket under each working condition, so that the first load is obtained;
And carrying out vector superposition on the fourth load applied to each direction of the suspension bracket under each working condition to obtain the second load.
5. The method for analyzing the strength of the suspension bracket according to claim 1, wherein the analyzing the strength of the suspension bracket according to the stress value specifically comprises:
Comparing the stress value with a preset target stress value; wherein the target stress value is the yield limit of the material of the suspension bracket;
When the stress value is smaller than the target stress value, judging that the strength of the suspension bracket is qualified;
and when the stress value is not smaller than the target stress value, judging that the strength of the suspension bracket is unqualified.
6. The method of analyzing the strength of a suspension mount according to any one of claims 1-5, wherein the operating conditions include at least one forward operating condition, at least one reverse operating condition, at least one forward limit operating condition, and at least one reverse limit operating condition.
7. A suspension bracket strength analysis device, comprising:
the rigidity curve acquisition module is used for acquiring rigidity curves of the suspension bracket in the X direction, the Y direction and the Z direction of the whole vehicle coordinate system;
The load decomposition module is used for decomposing the load applied to each direction of the suspension bracket under each working condition according to the stiffness curve, and superposing the load to obtain a first load and a second load; the first load is used for loading the suspended main spring rubber, and the second load is used for loading the suspended limit rubber;
The grid division module is used for carrying out grid division on the finite element model of the suspension bracket according to the structural characteristics of the suspension bracket;
the load loading module is used for loading the first load and the second load to grid areas corresponding to the suspension brackets respectively;
The stress acquisition module is used for establishing boundary constraint conditions according to the load applied to the suspension bracket and calculating to obtain a stress value; and
The strength analysis module is used for analyzing the strength of the suspension bracket according to the stress value;
The load decomposition module specifically includes:
the critical load determining unit is used for determining critical loads in the X direction, the Y direction and the Z direction according to the stiffness curve;
the load decomposition unit is used for decomposing the load applied to the corresponding direction of the suspension bracket under any working condition according to the critical load in any direction, and correspondingly obtaining a third load and a fourth load;
And the load superposition unit is used for correspondingly superposing the third load and the fourth load applied to each direction of the suspension bracket under each working condition to obtain the first load and the second load.
8. A computer readable storage medium, wherein the computer readable storage medium comprises a stored computer program; wherein the computer program, when run, controls a device in which the computer readable storage medium is located to perform the suspension bracket strength analysis method according to any one of claims 1-6.
9. A terminal device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the suspension bracket strength analysis method according to any one of claims 1-6 when the computer program is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910796558.8A CN112528388B (en) | 2019-08-27 | 2019-08-27 | Suspension bracket strength analysis method and device, storage medium and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910796558.8A CN112528388B (en) | 2019-08-27 | 2019-08-27 | Suspension bracket strength analysis method and device, storage medium and terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112528388A CN112528388A (en) | 2021-03-19 |
| CN112528388B true CN112528388B (en) | 2024-04-23 |
Family
ID=74973960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910796558.8A Active CN112528388B (en) | 2019-08-27 | 2019-08-27 | Suspension bracket strength analysis method and device, storage medium and terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112528388B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113591267B (en) * | 2021-06-17 | 2023-12-19 | 东风汽车集团股份有限公司 | Analysis method and device for suspension strength of gearbox shell |
| CN114624015B (en) * | 2022-05-11 | 2022-09-02 | 岚图汽车科技有限公司 | Method, device, equipment and storage medium for testing strength of vehicle part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104691298A (en) * | 2013-12-05 | 2015-06-10 | 广州汽车集团股份有限公司 | Displacement and stress obtaining method of power assembly suspension system |
| CN107506560A (en) * | 2017-09-13 | 2017-12-22 | 中国第汽车股份有限公司 | The method of calibration of driver's cabin stabilizer bar system roll angular rigidity |
| CN108846210A (en) * | 2018-06-19 | 2018-11-20 | 北京汽车股份有限公司 | Mounting bracket structural optimization method and system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9445711B2 (en) * | 2012-05-09 | 2016-09-20 | Carnegie Mellon University | System and method to magnetically actuate a capsule endoscopic robot for diagnosis and treatment |
| DE102013216181A1 (en) * | 2013-08-14 | 2015-02-19 | Schaeffler Technologies Gmbh & Co. Kg | Adjustment device for changing the compression ratio in an internal combustion engine |
| CN108717480A (en) * | 2018-04-27 | 2018-10-30 | 江铃控股有限公司 | The analysis method of mounting bracket |
| CN109084942B (en) * | 2018-06-01 | 2020-06-30 | 南京理工大学 | Linear guide rail pair static rigidity comprehensive measurement device and method |
| CN109885961A (en) * | 2019-03-05 | 2019-06-14 | 天津龙创世纪汽车设计有限公司 | A kind of electrical vehicular power assembly suspension operating condition force data processing method based on Excel |
-
2019
- 2019-08-27 CN CN201910796558.8A patent/CN112528388B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104691298A (en) * | 2013-12-05 | 2015-06-10 | 广州汽车集团股份有限公司 | Displacement and stress obtaining method of power assembly suspension system |
| CN107506560A (en) * | 2017-09-13 | 2017-12-22 | 中国第汽车股份有限公司 | The method of calibration of driver's cabin stabilizer bar system roll angular rigidity |
| CN108846210A (en) * | 2018-06-19 | 2018-11-20 | 北京汽车股份有限公司 | Mounting bracket structural optimization method and system |
Non-Patent Citations (4)
| Title |
|---|
| Development of analytical process to reduce side load in strut-type suspension;Y.I.Ryu etc;Journal of Mechanical Science and Technology;第24卷;第351-356页 * |
| HNSAE17212某纯电动汽车悬置支架强度有限元分析;王璐璐 等;第十四届河南省汽车工程科技学术研讨会;第331-332页 * |
| 基于弹射工况的抗扭拉杆强度仿真方法的研究;郭绍良 等;2018中国汽车工程学会年会论文集;第2.5节 * |
| 某动力总成悬置***载荷分析;梁林;汽车实用技术(第20期);第68-70页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112528388A (en) | 2021-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112528388B (en) | Suspension bracket strength analysis method and device, storage medium and terminal equipment | |
| US9846637B2 (en) | Machine learning based software program repair | |
| CN108629114B (en) | Assembly tolerance simulation analysis method for airplane assembly connection deformation | |
| CN112379668A (en) | Vehicle control data calibration method and device, computer equipment and storage medium | |
| CN116028886A (en) | BIM-based data processing method, system and cloud platform | |
| US10180897B2 (en) | Automated software program repair | |
| CN111897711A (en) | Method and device for positioning bug in code, electronic equipment and readable storage medium | |
| CN114139414A (en) | Vehicle battery bracket assembly performance testing method, device, equipment and medium | |
| CN115169068A (en) | Simulation method and device for electromagnetic radiation of electric automobile and storage medium | |
| CN110989497B (en) | Multi-axis multi-excitation vibration control combination selection method and system based on iterative optimization | |
| Tan et al. | Reliability paradox for worldwide automotive electronics | |
| CN114371018B (en) | Bench endurance test method and system for suspension bracket of automobile power assembly | |
| CN112733399B (en) | Failure evaluation method and device for bolt in random vibration | |
| US20210026999A1 (en) | Method and device for validating a simulation of a technical system | |
| Vyas et al. | A strategy and framework for analysis of operational data of automotive radars for development of active safety systems | |
| CN110308724B (en) | Automatic driving control method, automatic driving control device, vehicle, storage medium and electronic equipment | |
| CN113486444A (en) | Service life evaluation method and device of steering gear bracket and storage medium | |
| CN108312179B (en) | Elastic part testing method and device based on mechanical arm and mechanical arm | |
| CN111797470A (en) | Automobile quasi-static load decomposition method and system suitable for Internet | |
| CN117309299B (en) | Servo driver vibration test method, device, equipment and medium | |
| CN116090301A (en) | Rigidity performance analysis method and device for vehicle-mounted display screen | |
| CN108312177B (en) | Elastic part testing method and device based on mechanical arm and mechanical arm | |
| US6823740B1 (en) | Method of selecting a critical plane for multi-event fatigue life prediction | |
| CN114996999A (en) | Automobile body bolt fixing area modeling method and device | |
| CN111339604B (en) | Design method and device for dynamic stiffness of passive side of vibration isolation system and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |